<template>
    <div class="login_container">
        <div class="login_box">
            <!-- 头像区域 -->
            <div class="avatar_box">
                <img src="../assets/logo.png" alt="">
            </div>
            <!-- 登录表单区域 :model="loginForm"-->
            <el-form
                label-width="0px"
                class="login_form"
                :model="loginForm"
                :rules="loginFormRules"
                ref="loginFormRef"
            >
                <!-- 用户名 -->
                <el-form-item prop="username">
                    <el-input prefix-icon="el-icon-user-solid" v-model="loginForm.username"></el-input>
                </el-form-item>
                <!-- 密码 show-password -->
                <el-form-item prop="password">
                    <el-input prefix-icon="el-icon-lock" v-model="loginForm.password " show-password></el-input>
                </el-form-item>
                <!-- 按钮 -->
                <el-form-item class="btns">
                    <el-button type="primary" @click="login">登录</el-button>
                    <el-button type="info" @click="resetLoginForm">重置</el-button>
                </el-form-item>
            </el-form>
        </div>
    </div>
</template>

<script>
export default {
  data() {
    return {
      // 登录表单的数据绑定对象
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 登录表单的验证规则对象
      loginFormRules: {
        username: [
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 重置登录表单
    resetLoginForm() {
      this.$refs.loginFormRef.resetFields()
    },
    // 登录功能函数 validate表单方法，用于处理前端验证
    login() {
      this.$refs.loginFormRef.validate(async valit => {
        if (!valit) return
        const { data: res } = await this.$http.post('login', this.loginForm)
        if (res.meta.status === 200) {
          this.$message({
            message: '登录成功',
            type: 'success'
          })
        } else {
          this.$message({
            message: '登录失败',
            type: 'error'
          })
        }
        window.sessionStorage.setItem('token', res.data.token)
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style lang="less" scoped>
    .login_container {
        background-color: #2b4b6b;
        height: 100%;
    }
    .login_box{
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        width: 450px;
        height: 300px;
        background-color: #fff;
        border-radius: 3px;
        .avatar_box {
            position: absolute;
            left: 50%;
            transform: translate(-50%, -50%);
            height: 130px;
            width: 130px;
            border: 1px solid #eee;
            border-radius: 50%;
            padding: 10px;
            box-shadow: 0 0 10px #eee;
            background-color: #fff;
            img {
                height: 100%;
                width: 100%;
                border-radius: 50%;
                background-color: #eee;
            }
        }
    }
    .login_form {
        position: absolute;
        bottom: 0;
        width: 100%;
        padding: 0 20px;
        box-sizing: border-box;
        .btns {
            display: flex;
            justify-content: flex-end;
        }
    }
</style>
